\draw [sell] (action-1|-G c1r1.north) -- (action-1|-G c1r3.south);
\draw [buy] (action-2|-G c1r1.north) -- (action-2|-G c1r3.south);
\draw [sell] (action-3|-G c1r1.north) -- (action-3|-G c1r3.south);
\draw [buy] (action-4|-G c1r1.north) -- (action-4|-G c1r3.south);
\draw [sell] (action-5|-G c1r1.north) -- (action-5|-G c1r3.south);
\draw [buy] (action-6|-G c1r1.north) -- (action-6|-G c1r3.south);
\draw [sell] (action-7|-G c1r1.north) -- (action-7|-G c1r3.south);
\draw [buy] (action-8|-G c1r1.north) -- (action-8|-G c1r3.south);
\draw [sell] (action-9|-G c1r1.north) -- (action-9|-G c1r3.south);
\draw [buy] (action-10|-G c1r1.north) -- (action-10|-G c1r3.south);
\draw [sell] (action-11|-G c1r1.north) -- (action-11|-G c1r3.south);
\draw [buy] (action-12|-G c1r1.north) -- (action-12|-G c1r3.south);
\draw [sell] (action-13|-G c1r1.north) -- (action-13|-G c1r3.south);
\draw [buy] (action-14|-G c1r1.north) -- (action-14|-G c1r3.south);
\draw [sell] (action-15|-G c1r1.north) -- (action-15|-G c1r3.south);
\draw [buy] (action-16|-G c1r1.north) -- (action-16|-G c1r3.south);
\draw [sell] (action-17|-G c1r1.north) -- (action-17|-G c1r3.south);
\draw [buy] (action-18|-G c1r1.north) -- (action-18|-G c1r3.south);
